Great Chebeague Island Weather Forecast

    • 63
    • 71

    Rain Showers

    • 62
    • 77

    Mostly Sunny

    • 64
    • 73

    Partly Sunny

    • 66
    • 75

    Partly Sunny

    • 67
    • 77

    Slight Chance Thunderstorms

    • 66
    • 76

    Slight Chance Rain Showers

Today 3 Aug Coastal Cumberland

Areas of fog in the morning. Showers with a slight chance of Thunderstorms in the Morning, then Showers likely with a chance of Thunderstorms in the afternoon. Humid with Highs in the upper 70s. South Winds 15 to 20 Mph with Gusts up to 35 Mph. Chance of rain near 100 percent.

Tonight 3 Aug Coastal Cumberland

Partly cloudy with Showers with a slight chance of Thunderstorms in the Evening, then mostly clear after midnight. Humid with Lows around 60. Southwest Winds 10 to 15 Mph. Gusts up to 30 Mph in the evening. Chance of rain 90 percent.

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Great Chebeague Island Temperature Statistics

August Temperature

Portland, Portland International Jetport (9.3 miles)

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  • Average August

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Climate (2021–2026)

Portland, Portland International Jetport (9.3 miles)

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  • Average Low 2021–2026

    40.1 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    57.3 °F
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